Just be sure you only attack with the single creature if you want this to work. If you attack with the Acidic Slime and a Beast token, the savvy opponent can choose to block only the Beast with all his creatures, and the Slime will remain unblocked (and unable to kill any of his creatures). Predatory Rampage says that all his creatures have to block if able, but doesn’t say that all your attackers have to be blocked.
Lastly, don’t confuse this with Overrun. Your creatures get +3/+3, but they DON’T get trample!
Today’s Rules Tip written by
Trevor Nuñez, Level 1 judge from Roswell, NM